Historical Mirror: Sources of the Rusin and Hungarian Greek Rite Catholics in the United States of America 1884-1963 by Fr. John Slivka. A compendium of historical documents and some pictures relating to the establishment of the Ruthenian Byzantine Catholic Church (an Eastern Catholic Church in union with the Pope of Rome) in the USA. Records reaction to the papal decrees Ea Semper (1907) and Cum Data Fuerit (1929) which imposed priestly celibacy on the Ruthenian Church in the USA and led to defections to Eastern Orthodoxy. Original copyright was not renewed and it is now in the public domain. The 18.6 MB PDF is bookmarked and searchable.